70808640 has 224 divisors, whose sum is σ = 264225024. Its totient is φ = 15728640.

The previous prime is 70808627. The next prime is 70808663. The reversal of 70808640 is 4680807.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275392 + ... + 275648.

It is an arithmetic number, because the mean of its divisors is an integer number (1179576).

Almost surely, 2^70808640 is an apocalyptic number.

70808640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70808640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132112512).

70808640 is an abundant number, since it is smaller than the sum of its proper divisors (193416384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70808640 is a wasteful number, since it uses less digits than its factorization.

70808640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 70808640 is about 8414.7869848262. The cubic root of 70808640 is about 413.7094276016.

The spelling of 70808640 in words is "seventy million, eight hundred eight thousand, six hundred forty".